Influenza vaccination during pregnancy and influencing factors in Korea: A multicenter questionnaire study of pregnant women and obstetrics and gynecology doctors.

The proportion of self-reported influenza vaccination during pregnancy among 522 women was 63.2%. Pregnancy-related independent factors influencing maternal influenza vaccination were "(ever) received information about influenza vaccination during pregnancy" (OR 8.9, 95% CI 4.17-19.01), "received vaccine information about from OBGYN doctors" (OR 11.44, 95% CI 5.46-24.00), "information obtained from other sources" (OR 4.38, 95% CI 2.01-9.55), and "second/third trimester" (OR 2.41, 95% CI 1.21-4.82).. Among 372 OBGYN doctors, 76.9% routinely recommended vaccination for pregnant women. Independent factors effecting routine recommendation were "working at a private clinic or hospital" (OR 5.33, 95% CI 2.44-11.65), "awareness of KCDC guidelines" (OR 3.11, 95% CI 1.11-8.73), and "awareness of the 2019 national free influenza vaccination program for pregnant women" (OR 4.88, 95% CI 2.34-10.17). OBGYN doctors most commonly chose 'guidelines proposed by the government or public health (108, 46%) and academic committees (59, 25%), as a factor which expect to affect the future recommendation CONCLUSION: This study showed that providing information about maternal influenza vaccination, especially by OBGYN doctors, is crucial for increasing vaccination coverage in pregnant women. Closer cooperation between the government and OBGYN academic societies to educate OBGYN doctors might enhance routine recommendations.